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Finding the Fourth Proportional to 230,530.61, 318,133.64 and 128,562.52

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Solution

The fourth proportional to 230,530.61, 318,133.64 and 128,562.52 is: 177,417.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,530.61 : 318,133.64 = 128,562.52 : x
  2. Step 2: Convert to fraction form
    230,530.61/318,133.64 = 128,562.52/x
  3. Step 3: Cross multiply
    230,530.61x = 318,133.64 × 128,562.52
  4. Step 4: Simplify right side
    230,530.61x = 40,900,062,455.17
  5. Step 5: Solve for x
    x = 40,900,062,455.17/230,530.61
  6. Step 6: Final answer
    x = 177,417.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.